Investigating students mental model on fluid dynamic concept by FD-MT: a Rasch Model Analysis
F. H. Dewi, A. Syamsudin, D. T. Chandra

Universitas Pendidikan Indonesia, Bandung, Indonesia

Abstract

Fluid dynamics has some complex and unobservable concept. However, tests are rarely developed to measure students understanding of these concepts. This condtion make a difficulty to map students mental models with existing instruments. Based on that problem, this study aims to develop FD-MT (fluid dynamic-multi tier test ) as a diagnostic test for measure students mental model on fluid dynamic concept. The ADDIE (Analyzing, Designing, Developing, Implementing, Evaluating) is a research method that used in this study. The data were collected by FD-MT will be analyzed by rasch model analysis. Student mental model clasified as Scientific, Syntesis (Sy-A, SY-B, SY-C and Sy-D), and Initial. The participant of this study are 24 student in the eleventh grade (16-17 age in average) at high school in Bandung. Based on result study shows that students^ mental model mostly in mental Sc (8.18%), Sy-A (3.18%), Sy-B (21.36%), Sy-C (19.09%), Sy-D (38.18%) and In (10%), and incompleted answer (Nr = 0%). This conclude that, FD-MT is able to measureing students^ mental model on fluid dynamic concept.

Keywords: fluid dynamic, mental model, diagnostic test, ADDIE

Topic: Physics Education